Official character book only covers between chapters between 1 to 88. This is where All Might and other heroes assaults to League of Villains to save Bakugo.
So if you consider fights that Midoriya in until there I think you can see the pattern. Midoriya usually brakes his bones while fighting. Yes there are some fight that he don't but not that much. His fight between him and Muscular is a good example.
Even if you defeat someone that is so powerful but destroy yourself in the process that makes you a liability. You defeated one big guy good but if low tier villain can one shot you after that fight could you really call yourself that powerful?
Only handful amount of people know that Midoriya inherits All for One. To others he is not super powerful. Tournament Arc is a good example of it. How many pro hero was willing to recruit him?